Class: Rack::GCTracerMiddleware

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/gc_tracer.rb

Instance Method Summary collapse

Constructor Details

#initialize(app, view_page_path: nil, filename: nil, **kw) ⇒ GCTracerMiddleware

Returns a new instance of GCTracerMiddleware.



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# File 'lib/rack/gc_tracer.rb', line 9

def initialize app, view_page_path: nil, filename: nil, **kw
  @app = app
  @view_page_path = view_page_path
  @logging_filename = filename || GC::Tracer.env_logging_filename

  if @logging_filename && view_page_path
    @view_page_pattern = /\A#{view_page_path}/
  else
    @view_page_pattern = nil
  end

  GC::Tracer.start_logging @logging_filename, custom_fields: i(accesses), **kw
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rack/gc_tracer.rb', line 36

def call env
  if @view_page_pattern && @view_page_pattern =~ env["PATH_INFO"]
    GC::Tracer.flush_logging
    p env["PATH_INFO"]
    if env["PATH_INFO"] == @view_page_path + "/text"
      [200, {"Content-Type" => "text/plain"}, [open(@logging_filename).read]]
    else
      [200, {"Content-Type" => "text/html"}, [make_page]]
    end
  else
    GC::Tracer.custom_field_increment(0)
    @app.call(env)
  end
end

#make_page ⇒ Object 



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# File 'lib/rack/gc_tracer.rb', line 23

def make_page
  header = data = nil
  open(@logging_filename){|f|
    header = f.gets
    data = f.readlines
  }
  headers = "<tr>" + header.split(/\s+/).map{|e| "<th>#{e}</th>"}.join("\n") + "</tr>"
  data = data.map{|line|
    "<tr>" + line.split(/\s+/).map{|e| "<td>#{e}</td>"}.join + "</td>"
  }.join("\n")
  "<table>#{headers}\n#{data}</table>"
end